June 1982 – vol. 75, issue 6, pp 282–283 In this new feature, we shall periodically be reviewing commercial items of interest to birdwatchers. The items included will have been submitted by the manufacturers or their agents. The reviews will give the personal opinion of the reviewer; they will not be technical tests, but assessments as a result of use in appropriate conditions (e.g. in the field). Neither British Birds nor the individual... This article is only available to registered users.To read more, please log in or purchase a subscription.